Chevy 383 Stroker Rotating Assembly with Clevite bearings for 2 pc rear main seal.
INCLUDES 3/8 Cap Screw Rods!
Street / Strip rotating assemblies include the following:
New Upgrade Available! .100" Dome Pistons or Wiseco Forged Aluminum Pistons.. see below.
Compression ratio by CYL head CC for flattop pistons.
Part number
CID
58.0cc
64.cc
68.cc
72.cc
76.cc
H860CP
377
10.98
10.27
9.84
9.45
9.10
H860CP20
381
11.08
10.35
9.92
9.53
9.18
H860CP30
383
11.12
10.40
9.97
9.57
9.21
H860CP40
385
11.17
10.44
10.01
9.61
9.25
H860CP60
389
11.26
10.53
10.09
9.69
9.33
Compression ratio by CYL head for Dished Pistons... for use on street performance.
H859CP
10.16
9.89
9.55
8.85
8.55
H859CP20
10.24
9.98
9.63
9.26
8.93
8.62
H859CP30
10.28
10.02
9.67
9.30
8.96
8.65
H859CP40
10.33
10.06
9.71
9.34
9.00
8.69
H859CP60
10.41
10.14
9.79
9.42
9.08
8.76
Note: These kits are not balanced assemblies, balancing is strongly recommended for maximum performance and engine longevity.
A quick note about the crankshaft upgrade below.... The aero-winged crankshaft will increase horsepower by reducing windage. It has lightened holes in all rod throws and has straight shot oil holes. Another great product from Scat and Northern Auto Parts!
Compression ratio by CYL head CC with piston .005 in the block. This piston is .015 taller than most.
size
Standard
n/a
.020
.030
12.00
11.15
10.65
10.19
9.50
.040
12.05
11.20
10.69
9.54
.060
12.16
10.79
